Common Linux commands-permission management commands chmod

Common Linux commands-permission management commands chmod

Command name: chmod
Command: change the permissions mode of a file
Command path:/bin/chmod
Syntax: chmod [{ugoa} {+-=}{ rwx}] [file or directory]
[Mode = 777] [file or directory]
-R recursive Modification
Function Description: Change the permissions of a file or directory.

Number of Permissions
R 4
W 2
X 1
Rwxrw-r-
7 6 4

Example
Chmod g + w tstfile
Grant write permission to tstfile
Chmod-R 7777 testfile
Modify the testfile directory and the files in the directory to grant all permissions to all users.